RC5 a step too far?

[Geomagick]

Anyone else think that RC5-72 is going to take a little longer than most people are prepared to wait?

Current progress puts it at about 1100 years.

 

[Assimilator1]

I think quite a few of the old RC5ers think that ,hence TA RC5 72 is a very small team.
Inccidently as computers speed up that expected time will drop.

Anyway ,some still like to do it so each to their own😉

 

[ProviaFan]

I think that if RC5-72 had the participation that RC5-64 had, with Moore's "law," the time would eventually drop to a much more reasonable amount. However, it seems that some of the former RC5-64 participants have moved on to some of the scientific (SETI, DPAD, etc.) or medical (UD, DF, F@H, etc.) projects which they perhaps consider to be more practical or useful. Each to his/her own, but I'm sticking with with the medical and/or scientific projects, because that's what I'd rather donate my spare CPU time to.

 

[ViRGE]

Originally posted by: Assimilator1

Inccidently as computers speed up that expected time will drop.

Bingo. RC5-72 is alot, but RC5-64 was the same way near the beginning of the contest, where you had only a handful of people with PII class hardware, and the rest with more common K6, and P(MMX) chips. The project recieved a very significant boost just from MMX-ising the core for PMMX chips, not counting the growth it saw from beginning to end and general speed boosts. RC5-72 likely won't grow as fast as 64 did, and even if it grew like that, it would still take longer to complete than 64, but the overall time needed is going to be significantly less than the current predictions.

 

[sswingle]

Remember also, that the estimated completion time is to check 100% of the possible keys. Like RC5-64, it is highly possible that the winning key will be found long before that.

 

[SlangNRox]

Originally posted by: pwddesign
Remember also, that the estimated completion time is to check 100% of the possible keys. Like RC5-64, it is highly possible that the winning key will be found long before that.

I think rc5-64 came really close to 100% completion before the key was found. And that other dnet side project went to 200% if I remember correctly.

 

[Assimilator1]

Question.
RC5 64 was checking 64bit encryption right? & it proved pretty secure to brute force attack right? Is there any benefit to checking higher ?

 

[Slatzman]

Originally posted by: Assimilator1
Question.
RC5 64 was checking 64bit encryption right? & it proved pretty secure to brute force attack right? Is there any benefit to checking higher ?

my question exactly...but as was said before...if this is what people choose to do with their spare cycles..then have at it.

Slatz

 

[ViRGE]

Originally posted by: Assimilator1
Question.
RC5 64 was checking 64bit encryption right? & it proved pretty secure to brute force attack right? Is there any benefit to checking higher ?

I would hesitate to call it secure, simply because with things such as the VT BigMac cluster, RC5-64 can be crunched relitively quickly for what amounts to a few million dollars. Note that quickly is a relitive term, in that it's still on the order of well over a hundred days, but when compared to the years we used to measure things in, it's worth noting that RC5-64 probably isn't safe for high-priority secrets; it's only good for low-priority stuff such as online payments and other methods where a hundred days still makes the data inside useless.

 

[sswingle]

I guess the main reason is the chance at a cash prize. It is obvious that the security is good enough.

Personally, I prefer putting my cycles into science (SETI). I have run a wide variety of programs after stopping rc5. I did Aids@Home until a bug in their program frusterated me enough to leave, then I did united devices cancer for a while. Now I'm gonna find me an alien 😉

 

[zeruty]

Originally posted by: pwddesign
I guess the main reason is the chance at a cash prize. It is obvious that the security is good enough.

Personally, I prefer putting my cycles into science (SETI). I have run a wide variety of programs after stopping rc5. I did Aids@Home until a bug in their program frusterated me enough to leave, then I did united devices cancer for a while. Now I'm gonna find me an alien 😉

what are you gonna name him? will you keep him in a cage? take him for walks on a leash?? 😛

 

[Smoke]

I'm going to name the one I find, "Zeruty". 😛 😀

 

[zeruty]

yaaayy!! 😀😎🙂

 

[Assimilator1]

Originally posted by: zeruty

Originally posted by: pwddesign
I guess the main reason is the chance at a cash prize. It is obvious that the security is good enough.

Personally, I prefer putting my cycles into science (SETI). I have run a wide variety of programs after stopping rc5. I did Aids@Home until a bug in their program frusterated me enough to leave, then I did united devices cancer for a while. Now I'm gonna find me an alien 😉

what are you gonna name him? will you keep him in a cage? take him for walks on a leash?? 😛

Damn! ,now there's a good idea!😀 ,I could make millions putting it in a freak show!😛😉

Virge
Fair enough🙂